A compound of Formula (I): ##STR00001##
or a pharmaceutically acceptable salt thereof, in which Ring X is a 3 to 7 membered monocyclic ring, at least one of R.sub.1, R.sub.2, R.sub.3, and R.sub.4 is OR.sub.5 or CH.sub.2OR.sub.5 and the other R.sub.1, R.sub.2, R.sub.3, and R.sub.4 each independently are halogen, OH, OR.sub.5, CH.sub.2OR.sub.5, CO.sub.2H, OCOR.sub.6, (CO)R.sub.6, R.sub.6, C1-10 alkyl, C2-10 alkenyl, C2-10 alkynyl, H, or absent. Also provided herein are therapeutic uses of the compound of Formula (I).

A compound of Formula (I): ##STR00001##
or a pharmaceutically acceptable salt thereof, in which Ring X is a 3 to 7 membered monocyclic ring, at least one of R.sub.1, R.sub.2, R.sub.3, and R.sub.4 is OR.sub.5 or CH.sub.2OR.sub.5 and the other R.sub.1, R.sub.2, R.sub.3, and R.sub.4 each independently are halogen, OH, OR.sub.5, CH.sub.2OR.sub.5, CO.sub.2H, OCOR.sub.6, (CO)R.sub.6, R.sub.6, C1-10 alkyl, C2-10 alkenyl, C2-10 alkynyl, H, or absent. Also provided herein are therapeutic uses of the compound of Formula (I).

Phytosphingosine derivatives suitable as adjuvants in immune stimulation, pharmaceutical compositions comprising such compounds and the medical use of the compounds and/or compositions in therapeutic or prophylactic methods of immune stimulation in a subject, and for use in the treatment of a disease, for which stimulation of an immune response in a subject produces a therapeutic benefit. The phytosphingosine derivative may also be used as adjuvants in vaccinating a subject. The phytosphingosine derivative may also be used in stimulating antibody production, stimulating an immune response against infection, stimulating an immune response against a cancer, or preventing and/or treating septic shock. Methods for the manufacture of the derivatives comprising an Ugi-4-component reaction (Ugi-4CR) is also disclosed.

Phytosphingosine derivatives suitable as adjuvants in immune stimulation, pharmaceutical compositions comprising such compounds and the medical use of the compounds and/or compositions in therapeutic or prophylactic methods of immune stimulation in a subject, and for use in the treatment of a disease, for which stimulation of an immune response in a subject produces a therapeutic benefit. The phytosphingosine derivative may also be used as adjuvants in vaccinating a subject. The phytosphingosine derivative may also be used in stimulating antibody production, stimulating an immune response against infection, stimulating an immune response against a cancer, or preventing and/or treating septic shock. Methods for the manufacture of the derivatives comprising an Ugi-4-component reaction (Ugi-4CR) is also disclosed.